Json数据中同字段不同数据类型的解析

[
  {
    "code": 1,
    "data": 33
  },
  {
    "code": 2,
    "data": "string"
  },
  {
    "code": 3,
    "data": {
      "age": 22,
      "name": "rc"
    }
  }
]

package com.why.project.androidcnblogsdemo.model;

/**
 * Created by HaiyuKing
 * Used 解析data字段分别赋值Integer、String、JsonObject对象数据的JsonObject对象
 */

public class ParseDataModel {

    private int code;
    private Object data;

    public int getCode() {
        return code;
    }

    public void setCode(int code) {
        this.code = code;
    }

    public Object getData() {
        return data;
    }

    public void setData(Object data) {
        this.data = data;
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <Button
        android:text="显示JSONObject数据"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btn_show"
        android:layout_gravity="center_horizontal"/>

    <TextView
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:id="@+id/tv_show"
        android:hint="此处显示JSONObject数据"/>
</LinearLayout>

package com.why.project.androidcnblogsdemo.activity;

import android.content.Context;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

import com.why.project.androidcnblogsdemo.R;
import com.why.project.androidcnblogsdemo.model.ParseDataModel;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.util.ArrayList;

/**
 * Created by HaiyuKing
 * Used 解析data字段分别赋值Integer、String、JsonObject对象数据的JsonObject对象
 */

public class ParseDataActivity extends AppCompatActivity {

    private static final String TAG = "ParseDataActivity";

    private Button mShowBtn;
    private TextView mShowTv;

    private ArrayList<ParseDataModel> jsonDataList;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_parsedata);

        initViews();
        initData();
        initEvents();
    }

    private void initViews() {
        mShowBtn = (Button) findViewById(R.id.btn_show);
        mShowTv = (TextView) findViewById(R.id.tv_show);
    }

    private void initData() {

        jsonDataList = new ArrayList<ParseDataModel>();
        //从Assets中获取json数据字符串
        String jsonData = getStringFromAssert(this,"parseDataJson.json");
        Log.e(TAG,"jsonData="+jsonData);
        //解析json格式的字符串
        try {
            JSONArray jsonDataArray = new JSONArray(jsonData);
            if(jsonDataArray.length() > 0){
                for(int i=0; i<jsonDataArray.length();i++){
                    JSONObject jsonDataItemObj = jsonDataArray.getJSONObject(i);
                    ParseDataModel model = new ParseDataModel();
                    model.setCode(jsonDataItemObj.getInt("code"));
                    model.setData(jsonDataItemObj.get("data"));

                    jsonDataList.add(model);
                }
            }

        } catch (JSONException e) {
            e.printStackTrace();
        }

        //方案二，通过Gson解析，不过只能解析出来String类型，其他类型均为Object
        //https://segmentfault.com/q/1010000002779358
//        try {
//            JSONArray jsonDataArray = new JSONArray(jsonData);
//            if(jsonDataArray.length() > 0){
//                for(int i=0; i<jsonDataArray.length();i++){
//                    jsonDataList.add(new Gson().fromJson(jsonDataArray.getString(i),ParseDataModel.class));
//                }
//            }
//
//        } catch (JSONException e) {
//            e.printStackTrace();
//        }

        //http://www.cnblogs.com/zhujiabin/p/4660828.html
//        Type listType = new TypeToken<LinkedList<ParseDataModel>>(){}.getType();
//        Gson gson = new Gson();
//        LinkedList<ParseDataModel> parseDataModelsList = gson.fromJson(jsonData, listType);
//
//        String showResult = "";
//
//        for (Iterator iterator = parseDataModelsList.iterator(); iterator.hasNext();) {
//            ParseDataModel model = (ParseDataModel) iterator.next();
//            int code = model.getCode();
//            Object data = model.getData();
//            String dataType = "Object";
//            if(data instanceof Integer){
//                data = (Integer)data;
//                dataType = "Integer";
//            }else if(data instanceof String){
//                data = (String)data;
//                dataType = "String";
//            }else if(data instanceof JSONObject){
//                data = (JSONObject)data;
//                dataType = "JSONObject";
//            }
//            showResult += "code=" + code + ";data=" + data + "【dataType=" + dataType + "】\n";
//        }
//        mShowTv.setText(showResult);
    }

    private void initEvents() {
        mShowBtn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String showResult = "";
                //循环获取json数据
                for(int i = 0;i<jsonDataList.size();i++){
                    ParseDataModel model = jsonDataList.get(i);
                    int code = model.getCode();
                    Object data = model.getData();
                    String dataType = "Object";
                    if(data instanceof Integer){
                        data = (Integer)data;
                        dataType = "Integer";
                    }else if(data instanceof String){
                        data = (String)data;
                        dataType = "String";
                    }else if(data instanceof JSONObject){
                        data = (JSONObject)data;
                        dataType = "JSONObject";
                    }
                    showResult += "code=" + code + ";data=" + data + "【dataType=" + dataType + "】\n";
                }
                mShowTv.setText(showResult);
            }
        });
    }


    /**
     * 访问assets目录下的资源文件，获取文件中的字符串
     * @param assetsFilePath - 文件的相对路径，例如："listitemdata.txt或者"/why/listdata.txt"
     * @return 内容字符串
     * */
    public static String getStringFromAssert(Context mContext, String assetsFilePath) {

        String content = ""; // 结果字符串
        try {
            InputStream is = mContext.getResources().getAssets().open(assetsFilePath);// 打开文件
            int ch = 0;
            ByteArrayOutputStream out = new ByteArrayOutputStream(); // 实现了一个输出流
            while ((ch = is.read()) != -1) {
                out.write(ch); // 将指定的字节写入此 byte 数组输出流
            }
            byte[] buff = out.toByteArray();// 以 byte 数组的形式返回此输出流的当前内容
            out.close(); // 关闭流
            is.close(); // 关闭流
            content = new String(buff, "UTF-8"); // 设置字符串编码
        } catch (Exception e) {
            Toast.makeText(mContext, "对不起，没有找到指定文件！", Toast.LENGTH_SHORT)
                    .show();
        }
        return content;
    }
}